package com.atguigu.gmall.item.controller;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.list.client.ListFeignClient;
import com.atguigu.gmall.model.product.BaseCategoryView;
import com.atguigu.gmall.model.product.SkuInfo;
import com.atguigu.gmall.model.product.SpuSaleAttr;
import com.atguigu.gmall.product.client.ProductFeignClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @author 李旭
 * @date 2021/11/19 10:19
 * @Description:
 *
 *    商品详情  数据汇总及处理
 *
 */
@RestController
@RequestMapping("/api/item")
public class ItemApiController {

    @Autowired
    private ProductFeignClient productFeignClient;
    //自定义的线程池
    @Autowired
    private ThreadPoolExecutor threadPoolExecutor;
    @Autowired
    private ListFeignClient listFeignClient;

    //数据汇总  处理
    @GetMapping("/getItem/{skuId}")
    public Map getItem(@PathVariable Long skuId){
        Map result = new HashMap<>();
        CompletableFuture<SkuInfo> skuInfoCompletableFuture = CompletableFuture.supplyAsync(() -> {
            //1:库存信息
            SkuInfo skuInfo = productFeignClient.getSkuInfo(skuId);
            result.put("skuInfo", skuInfo);
            return skuInfo;
        }, threadPoolExecutor);

        CompletableFuture<Void> categoryViewCompletableFuture = skuInfoCompletableFuture.
                thenAcceptAsync(skuInfo -> {
            //2:一二三级分类
            BaseCategoryView baseCategoryView = productFeignClient.
                    getBaseCategoryView(skuInfo.getCategory3Id());
            result.put("categoryView", baseCategoryView);
        }, threadPoolExecutor);// 接收上一个任务的返回值  但是自己无返回

        CompletableFuture<Void> priceCompletableFuture = CompletableFuture.runAsync(() -> {
            //3:实时价格
            BigDecimal price = productFeignClient.getPrice(skuId);
            result.put("price", price);
        }, threadPoolExecutor);

        CompletableFuture<Void> spuSaleAttrListCompletableFuture = skuInfoCompletableFuture.
                thenAcceptAsync(skuInfo -> {
            //4:销售属性及值及选中
            List<SpuSaleAttr> spuSaleAttrList = productFeignClient.
                    selectSpuSaleAttrListCheckBySku(skuInfo.getSpuId(), skuInfo.getId());
            result.put("spuSaleAttrList", spuSaleAttrList);
        }, threadPoolExecutor);// 接收上一个任务的返回值  但是自己无返回

        CompletableFuture<Void> valuesSkuJsonCompletableFuture = skuInfoCompletableFuture
                .thenAcceptAsync(skuInfo -> {
            //5:组合数据 对应 SKUID   页面上要的是JSON串
            Map saleAttrValuesBySpu = productFeignClient.getSaleAttrValuesBySpu(skuInfo.getSpuId());
            result.put("valuesSkuJson", JSONObject.toJSONString(saleAttrValuesBySpu));
        }, threadPoolExecutor);// 接收上一个任务的返回值  但是自己无返回
        //添加商品的热度评分
        CompletableFuture.runAsync(() -> {
            listFeignClient.hotScore(skuId,1);
        }, threadPoolExecutor);
        //多线程组合
        CompletableFuture.allOf(skuInfoCompletableFuture,
                categoryViewCompletableFuture,priceCompletableFuture,
                spuSaleAttrListCompletableFuture,valuesSkuJsonCompletableFuture).join();
        //返回汇总结果
        return result;
    }
}
